135921317 has 8 divisors (see below), whose sum is σ = 157305600. Its totient is φ = 115028784.

The previous prime is 135921281. The next prime is 135921319. The reversal of 135921317 is 713129531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135921317 - 2¹⁰ = 135920293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135921319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122342 + ... + 123447.

It is an arithmetic number, because the mean of its divisors is an integer number (19663200).

Almost surely, 2^135921317 is an apocalyptic number.

It is an amenable number.

135921317 is a deficient number, since it is larger than the sum of its proper divisors (21384283).

135921317 is an equidigital number, since it uses as much as digits as its factorization.

135921317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245875.

The product of its digits is 5670, while the sum is 32.

The square root of 135921317 is about 11658.5297958190. The cubic root of 135921317 is about 514.1571244166.

The spelling of 135921317 in words is "one hundred thirty-five million, nine hundred twenty-one thousand, three hundred seventeen".